Warming and ventilating gas-stove



P. 1. OGLE. I WARMING AND VENTILATIN'G GAS sTovE.

APPLICATION FILED JULY 7| I919 Patented J an. 13, i920.

. 0L R 0a w LFk K m II A MW i 7 :1:

. rinrrnn snares rarnnr sermon PERCY JOHN OGLE, OF LONIDGN, ENGLAND, ASSIGNGR TO VENT I HETA LIMITED.

WARMING AND V ENTILATING GAia-STOVE.

Specification of Letters Patent.

Patented Jan. 13, 19250.

Application filed July 7, 1919. Serial No; 309,104. g a

To all whom it may concern:

Be it known that I, PERCY JOHN OeLn, a subject of the King of Great Britain, residing at 6 Broad Street Place, London, England, have invented new and useful Improvements in Warming and Ventilating Gas-Stoves, of which the following is a specification.

This invention relates to warming and ventilating gas stoves of the type wherein an outer casing'has arranged within it a wall or chamber designed to be heated by a gas flame and through which casing fresh air is caused to pass in such a manner that it does not come into direct contact with the source of heat, the air in its passage through the said casing being heated by contact with the heated surface, and then entering the room or apartment to be warmed, the object of this invention being to produce an apparatus of this kind which operates more elit ciently than apparatus of a similartype heretofore constructed.

In apparatus constructed according to the said invention an outer casing has arranged within it a heating chamber between the outslde of which and the wall or casing of the apparatus a passage is formed through which the air to be warmed passes such pas sages being sufiiciently constructed to insure that the whole body of air passing through this passage is uniformly heated to insure a rapid upward flow which would not be obtainable if the passage was so wide that only the portion of air in immediate proximity to the heating surface was warmed, which would result in causing the eddying of the air in the passage and so preventing rapid flow. A burner is ar ranged at the bottom of the said heating chamber, extends through the floor of the same and communicates with a tube, which admits a mixture of gas and atmospheric air into the chamber. By this construction, air other than that which passes through the burner, is prevented from entering the heating chamber.

This arrangement insures that practically all the heat given off from the walls of the inner heating chamber will be imparted to the air passing through the air space, there by insuring a rapid flow of air through the said space and at the same time rendering sulating material, or it may be coated or lagged with such a material.

A heating apparatus embodying the invention is illustrated in the accompanying drawings, in which q Figure l is a vertical section ofthe improved apparatus; and,

Figs. 2, 3 and at are sections on the lines 22, 3-3, and 4-4:, respectively, of 1.

a indicates a base which is preferably made of cast-iron and which has within it an inverted bell b which is preferably cast in one piece with the base and connected thereto by a series of websc, c,-a passage d being provided for affording access to the interior of the bell from the outside ofthe apparatus. v v

2 indicates the outer wall of the apparatus which is fitted into the upper end 'ofthe base and supported upon the webs ,0, and f indicates the wall of the heat chamber. garranged within the casingso as to form a passage it for the air tobe heated between the two chambers, and which passage is caused to gradually increase in sectional area from the bottom to the top so as to -a fford space for the expansion of the air being heated as it flows through the passage lz ThG h m e may be of theme external shape in horizontal section asthe casing, but is preferably made of corrugated or channeled section, as shown, as a greater heating area is thereby obtained than with a circular heat chamber. When an inner chamber of the same sectional shape as the outer casing is used such inner chamber may be made slightly tapering in order to provide'the necessary taper for the passage h, but when the inner chamber is corrugated or channeled it will usually be advantageous to make the said inner chamber of they same diameter throughout and to taper the outer casing as shown. The said heat chamber is supported at its lower end upon a flange or shelf 11 cast integral with the bell b and is jointed or bedded thereon so as'to prevent the admission of air. The upper end of the apparatus is provided with a cap or cover is which rests upon the wall f of the heat chamber to close the latter, and'is provided with a flange Z which fits around the casing 6. Another flange m also projects into the upper end of the heat chamber to center the latter with relation to the casing e.

A series of holes n is provided in the flange Z for the escape of the air warmed in the passage 7. Bolts, not shown, are passed through the base and cover, to hold the parts together.

The burner 0, which burns a mixture of air and gas, passes through the bottom of the inverted bell Z) and communicates with a tube 0, Which supplies the air and gas mixture. 'By this construction, air, other than that which enters through the burner tube and which is consumed in the flame, is excluded from the chamber g. In order to distribute the heat of the burner flame over the walls f and to deflect it into the floor of the chamber a battle p of fireclay or other material is fixed above the burner, such baiile, as shown, being carried by a cross bar Q.

A door 7 is provided in the base to close the opening d and afford access to the burner for lighting the same. At the upper end of the heat chamber is an opening 8 through which the products of combustion can escape, and a pipe, not shown, can be provided to conduct these products either to the outer air or to a condenser of any convenient type. This opening a must be made so small that practically no greater volume of air will be allowed to escape than enters through the burner so that the heat chamber will be maintained full of the heated products of combustion.

Owing to the exclusion of atmospheric air from the heat chamber the walls of th latter become so heated that no condensation of .7 moisture will take place in the said chamber relation to the bell 6, having a pipe, not shown, connected to it to conduct fresh air from outside the room or apartment to be heated into the apparatus.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, ll declare that what I claim is 1. A. gas stove comprising a base having an open top and housing an imperforate inverted bell-shaped burner chamber having an open top and provided below the top with a horizontal shelf, a burner tube extending through the wall of the burner chamber for supplying a mixture of air and gas thereto, a pipe communicating with the tube for con veying a mixture of air and gas to the same an air chamber arranged between the burner chamber and the wall of said base, means for admitting air to said air chamber, an imperforate inner vertical tubular casing resting on said shelf and inclosing the top portion of said burner chamber, an outer vertical tubular casing surrounding the inner casing and spaced therefrom to provide an annular air passage, the lower end of the outer casing engaging the upper end of the base and the lower end of the air passage communicating with the air chamber, and a top for said casings.

2. A stove of the kind defined in claim 1 in which the upper portion of the air passage is of larger area than the lower portion to permit expansion of the air being heated.

3. A stove of the kind defined in claim 1, in which the Wall of the inner casing is corrugated and the wall of the outer casing tapers toward its lower end.

PERCY JOHN OGLE. 

